SBI Credit Card — Change back to registered mobile number

Address:

New Delhi, Delhi, 110034

Sir,
Some fraud person has changed my registered mobile no. You are requested to please change it back to my original registered mobile number, which is [protected]. I have already got my card blocked.

I just noticed that there is a mail in my inbox dated 10/7/2016 at 8.35 pm that says "dear cardholder,
The one time password (Otp) for your online transaction on flipkart internet pvt ltd for inr 59299.00 on your sbi card no. 8872 is 230153."

I also found 2 messages on my registered mobile that i somehow missed. These are dated 6/7/2016 (5.15 pm). The first one states "otp for your sbi card no. Xx8872 to update contact info is 435734. This otp... And the usual wordings". The second one with no separate time states "as per your request, we have updated your registered mobile no. You will start receiving otp for online transactions on your new mobile no. Within 28 hrs. If you have not made..."

Regards,
Alka sharma